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Polish Maritime Research

ANALYSING APPLICABILITY OF SELECTED METHODS TO SMOOTH INDICATOR DIAGRAMS OF MARINE MEDIUM-SPEED ENGINE

Abstract

The article analyses the applicability of selected smoothing methods to smooth indicator diagram curves and to filter disturbances. An intermediate goal of the study was an attempt to extract disturbances recorded during pressure curve smoothing, which are believed to be a source of important diagnostic information. Within the framework of the reported analysis, a comparison was made between the moving average method, the Savitzky-Golay filter, and the frequency filtration method. The research was performed on a marine medium-speed engine Sulzer 3Al 25/30, which has a relatively long indicator passage.

Keywords:

indicator diagrams, smoothing waveforms, filtering disturbances

Details

Issue
Vol. 22 No. 2(86) (2015)
Section
Latest Articles
Published
10-07-2015
DOI:
https://doi.org/10.1515/pomr-2015-0017
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Authors

Rafał Pawletko

Gdynia Maritime University

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